In Episode 5, he is present when Sherrif Charlie Mills discovers the mutilated body of Reverend Fain in the river, only seconds before Thomas Wellington was killed at the wedding rehearsal. He is shown lowering the chandelier where the headspade was for further investigation and is told to photograph it and pull fingerprints off. He even comments on when Charlie Mills says on how Richard Allen's jacket contaminated the crime scene, with him saying he's glad its there and is in no hurry to see what's under it after seeing what happened to Reverend Fain. He is also involved in the capture of J.D. Dunn in Episode 7 with the people and hound dogs In the chase after him. He presumably died in between this and episode 11 as he is never seen again after that scene.
- Lillis is the last of the three cops on the island (Deputy Garrett, Charlie Mills and himself) to die.
- His death, along with Beth Barrington, Kelly Seaver, and Katherine Wellington is one of four whose death isn't shown.